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Change of plasma insulin‐like growth factor‐1 (IGF‐1) concentration with early growth in Japanese beef cattle
Author(s) -
SUDA Yoshihito,
NAGAOKA Kentaro,
NAKAGAWA Kazuki,
CHIBA Takashi,
YUSA Fumihiro,
SHINOHARA Hisashi,
NIHEI Akira,
YAMAGISHI Toshihiro
Publication year - 2003
Publication title -
animal science journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.606
H-Index - 38
eISSN - 1740-0929
pISSN - 1344-3941
DOI - 10.1046/j.1344-3941.2003.00106.x
Subject(s) - medicine , insulin like growth factor , beef cattle , endocrinology , insulin , weaning , plasma concentration , growth factor , biology , nefa , zoology , chemistry , receptor
The aim of the present study was to examine the change in plasma insulin‐like growth factor‐1 (IGF‐1) concentration with early growth, changes of bodyweight (BW) and relative dairy gain (RDG) in the pre‐ (PRW) and postweaning periods (POW) in Japanese beef cattle, and relationships with metabolites. A total of 33 calves, 22 Japanese black, 6 Japanese shorthorn and 5 of their crossbreed were studied. Insulin‐like growth factor‐1 and metabolite (glucose, triacylglycerol, nonesterified fatty acid) levels in the plasma, from jugular vein blood taken every month, were measured along with BW. Insulin‐like growth factor‐1 in POW increased dramatically with increase of BW ( P < 0.05), and the correlation was positive at 0.52 ( P < 0.01). Glucose levels correlated significantly with BW, RDG and IGF‐1 ( P < 0.01). Metabolic required calorie correlated positively with IGF‐1 ( P < 0.01). Also, correlations of BW in POW, with BW and RDG in PRW were positive ( P < 0.01). Growth in PRW would be influenced by maternal effects, while active self‐secretion of IGF‐1 in POW might contribute to POW growth. These factors suggested that to increase growth in PRW, maintaining enough maternal effect and IGF‐1 level in POW, was important for establishing better growth after weaning.